首页>
外国专利>
PRODUCTION METHOD FOR POLYTETRAFLUOROETHYLENE POROUS FILM, PRODUCTION METHOD FOR WATERPROOF AIR-PERMEABLE MEMBER, AND PRODUCTION METHOD FOR AIR FILTER FILTERING MEDIUM
PRODUCTION METHOD FOR POLYTETRAFLUOROETHYLENE POROUS FILM, PRODUCTION METHOD FOR WATERPROOF AIR-PERMEABLE MEMBER, AND PRODUCTION METHOD FOR AIR FILTER FILTERING MEDIUM
展开▼
机译:聚四氟乙烯多孔膜的制造方法,防水透气性构件的制造方法以及空气过滤器过滤介质的制造方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A method comprising: a step (A) in which a mixture including a PTFE fine powder and a liquid lubricant is pushed out into a sheet shape and a PTFE sheet is obtained; a step (B) in which the PTFE sheet is caused to pass through and is rolled between a pair of rolls along the longitudinal direction of the PTFE sheet; a step (C) in which the rolled PTFE sheet is heated to a temperature of at least 19°C; a step (D) in which the rolled PTFE sheet being at a temperature of at least 19°C is extended in the width direction thereof; a step (E) in which the liquid lubricant is removed from the PTFE sheet; and a step (F) in which the PTFE sheet having the liquid lubricant removed therefrom is extended in both the longitudinal and width directions thereof and is made porous.
展开▼